Rod and cross-pin connection and method of making same



C. F. S. BYRNE. ROD A'ND CROSS PIN CONNECTION AND METHOD or MAKING SAME.

Patented May 23,1922.

APPLICATION FILED MAR- 8, I920- II' H UNETE rice.

CHARLES E. S. BYRNE, OF JANESVILLE, VI'ISOONSIN, ASSIG-NOR TO GENERAL MOTORS CORPORATION, OF DETROIT, MICHIGAN, A CORPORATION OF DELAWARE.

ROD AND CROSS-PIN CONNECTION AND lvIETI-IOD OF IIIAKING SAME.

Application filed March 8, 1920.

To all whom it may concern Be it known that 1, CHARLES F. S. BYRNE, a subject of the King of Great Britain, and a resident of Janesville, county of Rock, and State of lVisconsin, have invented certain new and useful Improvements in Rod and Cross-Pin Connections and Methods of Making Same, of which the following is a full, clear, concise, and exact description, such as will enable others skilled in the art to which the invention relates to make and use the same, reference being made therein to the accompanying drawings, which form a part of this specification.

This invention relates to rod and cross pin connections and method of making the same.

One of the objects of the invention is the provision of means for securing a cross pin in its supporting rod, that is simple, efficient and not likely to permit the pin to become detached.

Another object of the invention is to provide a method of securing a cross pin in its supporting rod that is simple, readily accomplished and inexpensive to perform.

Other objects and advantages will appear from the following description and claims.

While I have shown and shall hereinafter describe my device and method of making the same as applied to a starting crank for an internal combustion engine, yet it is understood that this is only one embodiment of my inventive idea, and that I contemplate employing this means in connection with other devices.

In the drawing:

Figure 1 is a side view of a crank for an internal combustion engine;

Figure 2 is a detail view of the inner end of the crank, partly in section, showing the pin in position prior to being secured therein;

Figure 3 is a view. similar to Figure 2 but showing the pin secured in position;

Figure 4 is a perspective view of the pin; and

Figure 5 is a perspective view of the pin with a modified form of recess.

On the drawing, the numeral 1 designates a crank for an internal combustion engine, 2 the body portion thereof, 3 the handle therefor and a the laterally extending engine engaging end. The end 4 is provided with a transversely extending aperture 5 adj acent to its extremity.

Specification of letters Patent.

Patented May 23, 1922.

Serial No. 364,089.

A pin 6 having a recess 7 between its ends is placed in the aperture in the end a. The recess 7 may be of any form, that shown in Figure being arranged transversely to the pm.

After the pin is placed in position in the aperture, metal of the end 4; is distorted into the recess 7. The metal on the side or end may be distorted into the recess but preferably the distortion is made from the end rather than from the side of the rod, since it does not distort the form or shape of the rod. I accomplish this by first countersinking the end of the rod as at 8. This countersink 8 may be of any shape, but is preferably conical in form.

lVhen the end of the rod is countersunk. the pin is placed in position with its recess opposite the countersink o as shown in Figure 2, and with a punch or other means, metal is distorted into the recess as shown in Figure 3, thus firmly and securely fastening the pin in position.

In the modification shown in Figure 5, the recess 7 is shown as being conical in form. The pin is secured in position in the same manner as the pin 6 in Figure 3.

I claim:

1. The method of securing a cross pin in an apertured rod having a countersink in its end, which consists in forming a recess in said pin, placing said pin in the recess of the rod so that the recess will be opposite said countersink, and distorting the metal beneath said counter sink into said recess.

2. As an article of manufacturing, a rod having its end countersunk and having an aperture therethrough and a pin having a recess, secured in said aperture and having metal adjacent to the bottom of said countersink extended into said recess.

8. A starting crank for internal combustion engines having its end countersunk and provided with an aperture transversely therethrough adjacent to the countersink, a pin in said aperture, and having a recess intermediate the ends thereof, located opposite the bottom of said countersink, and metal adjacent the bottom of said countersink distorted into said recess for securing the pin in said aperture.

In testimony whereof I atlix my signature. 

